Liquidtight connector

ABSTRACT

A liquidtight connector for connecting sheathed flexible conduit to switch or outlet boxes and the like in which the cutoff end of the conduit has applied thereto a ferrule that has a threaded connection with the conduit and defines an outer portion which is received over the conduit sheathing and terminates in an outwardly flared lip. The ferrule covered end of the conduit is received within one end of the connector body, with the ferrule being proportioned such that its lip seats against the terminal portion of the said connector one end. A contractable gland received over the conduit is clamped by a seal nut against the lip of the ferrule to contract same into liquidtight relation with the conduit. The other end of the connector body is secured to the box by a conventional lock nut in the case of knockout openings with an O-ring seal and retainer therefore being employed between the box wall and the connector body, and in the case of hub-type openings, the other end of the connector body is applied directly thereto.

United States Patent [151 3,647,934

Hurtt Mar. 7, 1972 [54] LIQUIDTIGHT CONNECTOR FOREIGN PATENTS RAPPLICATIONS [72] Inventor: Terry J. llurtt, Aurora, 111. 919,848 2/1963 Great Britain ..285/249 22 Filed; Man 5, 1970 Attorney-Mann, Brown,McWilliarns & Bradway [21] Appl. No.2 16,696

U.S. Cl. ..'.l74/65 R, 174/78, 285/161,

[57] ABSTRACT A liqui'dtight connector for connecting sheathed flexibleconl duit to switch or outlet boxes and the like in which the cutoff235/248 end of the conduit has applied thereto a ferrule that has a [51]Int. Cl. 023 3/06 threaded connection with the conduit and defines anouter [58] Field 01 Search ..285/248, 249, 247, 245, 161, portion whichis received over the conduit sheathing and ter- 285/ 158; 174/65 R, 65SS, 75 C, 78 minates in an outwardly flared lip. The ferrule covered endof theconduit is received within one end of the connector body, [56]References Cited with the ferrule being proportioned such that its lipseats against the terminal portion of the said connector one end. AUNITED STATES PATENTS contractable gland received over the conduit isclamped by a seal nut against the lip of the ferrule to contract sameinto fohs ..l74/78 liquidtight relation with the conduit. The other endof the com ohnson... ..174/78 n t bod d th be h n fio H k 3 492 4101/1970 Kelly ..285/248 x y secure y 2255673 l 941 M D the case ofknockout openings with an O-nng seal and retainer 9/ c emott 161 Xtherefore being employed between the box wall and the con- 2,782,02/1957 Appleton ..285/248 nectm, body, and in the case of hubwpeopenings, he other 616,808 12/1898 Rmketts "285/161 x end of theconnector body is applied directly thereto. 3,206,232 9/1965 Gleason etal. ..285/ 161 1,809,582 6/1931 Church ..285/l61 X 4 Claims, 5 DrawingFigures Patented March 7, 1972 FIG! 2 Sheets-Sheet 1 INVENTOIR TERRY J.HURTT 777mm, 2 7 i TORNEYS Patented March 7, 1972 2 Sheets-Sheet 2 FIG-4A ga a- 5. E

INVENTOR TERRY J. HURTT c nu u,

ATTORNEYS g LIQUIDTIGHT CONNECTOR formed from a suitable flexiblematerial such as rubber or the like. Use of this type usually requiresthatthe attachment of same to outlet boxes, switch boxes, and the likebe also liquidtight or waterproof in nature.

A principal object of this invention is to provide a connector devicefor securing the ends of liquidtight conduits to outlet boxes, switchboxes, andthe like, which device is liquidtight in nature and result.

Another principal object of the invention is to provide a connectordevice of the type indicated in'which a grounded liquidtight flexiblemetallic conduit connection is provided without penetrating the conduitsheathing.

Another principal object of the invention is to provide a liquidtightconnector embodying few and simple parts that will reliably establishthe liquidtight characteristics that are desired, and that are allreusable in nature.

Still other objects of the invention are to provide a liquidtightconnector that is economical of manufacture, convenient to use, longlived in application, and reusable in nature.

In accordance with this invention, the cutoff end of theconduit hasapplied thereto a ferrule having an inner portion formed for threadedengagement with the metal core of the conduit, and an outer .portionwhich overlies the conduit end and terminates in an outwardly flaredlip. The ferrule covered end portion of the conduit fits within one endof a doubleended connector body, the other end of which is proportionedfor application to the usual knockout hole of outlet boxes and the like.The ferrule is proportioned such that its lip seats against the terminalportion of the connector body end in which the ferrule is disposed toprovide a 360 ground with the connector body. Also applied over theconduit end are a split gland and a seal nut, with the latter beingthreadable on the connector body end in which the ferrule is received,and including a cam surface that engages the gland to clamp same againstthe ferrule lip, whereby the gland is cammed into contracted sealtightrelation with the conduit sheathing.

Other objects, uses, and advantages will be obvious or become apparentfrom a consideration of the following detailed description and theapplication drawings.

In the drawings:

FIG. 1 is a plan view of an outlet box having applied thereto oneembodiment of this invention to connect liquidtight flexible metallicconduit thereto;

FIG. 2 is an exploded plan view of the connector of FIG. 1, includingthe portion of the box wall to which it is connected and the end portionof the flexible conduit that is connected to the box wall;

FIG. 3 is a sectional view through the connector body of FIGS. 1 and 2as applied to the conduit end, with the box wall and locknut omitted-andthe connector parts shown in position to draw the device gland intosealing relation with the conduit;

FIG. 4 is a view similar to that of FIG. 1 showing a connector inaccordance with this invention adapted for application to hub assembliesand the like; and

FIG. 5 is an exploded plan view of the connector of FIG. 4.

However, it is to be understood that the specific embodiment illustratedis provided primarily to comply with the requirements of the PatentCode, and the invention may have other specific embodiments that will beobvious to those skilled in the art and are intended to be covered bythe appended claims.

Reference numeral of FIG. I generally indicates one embodiment of theliquidtight connector of this invention that is adapted for applicationto an outlet box 12 for the purpose of securing same to conduit 14.

The box 12 is entirely conventional in nature, and is intended torepresent any form of outlet box, switch box, and other structures ofthis type to which the connector 10 may be applied. Box 12 in the formshown includes bottom wall 16 and sidewalls 18, each formed with thefamiliar knockouts 20, each of which, when removed, defines a plain orunthreaded box opening 22 (see FIG. 2) that is characteristic of stampedmetal boxes, to which the connector 10 is applied. The box bottom wall16 may also be formed with suitable holes 23 to receive securing nailsor the like, as will be apparent to those skilled in the art.

The conduiting 14 will be recognized as being of the conventionalliquidtight flexible metallic type employing a metallic core 24 definedby spirally wound metallic stripping 26 having partially overlappingconvolutions 28 that define an internal spiral groove 30, which core 24is enclosed by aprotective sheath 32 formed from a suitable resilientyieldable material, such as natural or synthetic rubber of theirequivalents. The core 24 is thus tubular in nature to receive electricwiring that is to extend into the box 12.

The connector lflgenerally comprises a connector body 40 defining atapered threaded end portion 42 and a straight or untapered end portion44, a lock nut 46, O-ring seal 47, and retainer disc 49 for sea] 47 thatare received on connector body portion 42, a ferrule 50 that is receivedover the cutoff end 52 of the conduit 14 and is received within theconnector body 40, and a contractable gland that is applied over theconduit 14 :and is clamped by the seal nut against the ferrule 50 tocontract same into sealing relation with the external surface 56 of theconduit 14.

As seen in FIG. 3, the connector body defines a bore 60 of steppeddiameter configuration including bore portion 62 separated from boreportion 64 by a tapered annular surface 66. As indicated in FIG. 2, theend portion 42 of the connector body 40 is of less diameter than the endportion 44, and it is proportioned t'o be applied in a conventionalmanner to the box opening 22 formed by eliminating one of the knockouts20 for application thereto of conventional locknut 46. Connector body 40defines intermediate the end portions 42 and 44 a ridge portion 68 thathas a hex-shaped periphery 70 and defines an abutment wall 72 betweenwhich and the box wall 16 or 18, O-ring 47 and retainer 49 are receivedwhen the locknut 46 is tightened into place in the well-knownconventional manner.

The end portion 44 of the connector body 40 is proportioned to closelyreceive the cutoff end 52 of the conduit 14 with the ferrule 50 appliedthereto. The terminal edge portion 76 of same is formed to define theannular beveled chamfer surface 78'that is shown in FIG. 3.

The ferrule 50 comprises an inner annular sleeve portion 80 thatisprovided with a spiral indentation 82 which complements the spiralgroove 30 of the conduiting core 24 for purposes of turning the ferruleinto firm engagement with the conduiting cutofiend 52. Theferrule-50also includes an outer annular sleeve portion orskirt 84 extending fromthe end portion 86 of the ferrule toward the otherend 87 of the ferruleand defining anoutwardly flared lip 88 which is proportioned to seatagainst the annular surface 78 of connector body 40, when the ferrule isapplied to the bore 64 of the connector body. Lip 88 defines a taperedcam surface 89 that is to cooperate with the gland '54 in the mannerabout to be described. The annularportions 80 and 84 and the ferruledefine a pocket 90 in which :the cutoff end portion 52 of the conduit 14is contained when the ferrule is threaded into place on the conduitingend in the manner indicated in FIG. 3. Ferrule-end portion 86 may besquared (as shown) or rounded, as desired.

Seal nut 48 comprises an annular member 92 having a hexshaped periphery94 and defining a bore 96 that is internally threaded as at 98 (see FIG.3) for application to the threading of connector body end portion 44.The'bore 96 of nut 48 is also formed to define annular tapered camsurface 100 that engages the gland 54 when assembling the coupling l0.

The gland 54 comprises an annular member 102 formed from a suitableplastic material and having an internal diameter which is somewhat lessthan the external diameter of the conduit sheathing 32. The glandelement 54 is split as at 104 and is proportioned so that in itsuncontracted relation, in which the gland end portions 106 and 108 arespaced from each other, the gland loosely fits over the exterior surface56 of conduit 14. The gland element about its periphery defines aconvexly contoured surface 110 for cooperation with the cam surface 100of the seal nut 48 and the annular cam surface 89 that is defined by theferrule lip 88.

As indicated in FIG. 3, the undersurface 112 of the gland is concave innature such that the gland defines a pair of annular edge portions 114and 116 which engage the surface 56 of the conduit sheathing 32.

The connector may be employed to attach the conduiting 14 to a box, suchas box 12, by first removing an appropriate knockout to open a desiredopening 22. The seal nut 48 and the gland 54 are then slipped over theend of the conduit, in that order, with the nut 48 being oriented sothat its threading will be at the end of the nut that faces the end 52of the conduit 14. The ferrule 50 may then be applied to the end 52 ofthe conduiting (it being assumed that the end 52 has previously beenformed by a suitable cutting operation to define a terminal portion 120that extends transversely of the conduiting). To do this, the ferrule isoriented to dispose the spiral indentation 82 of its inner portion 80 inalignment with the spiralled groove 30 of the conduit core 24, and thenthe ferrule is threaded onto the conduit end by turning same relative toa core 24, which results in the end 52 of the conduit 14 being fullydisposed within the pocket 90 defined by the ferrule in the mannerindicated in FIG. 3 and the ferrule portion 80 being in good electricalcontact relation with core 24.

The ferrule that is thus applied to the conduit end is inserted withinthe bore portion 64 of the connector body 40 to bring the chamfersurface 78 of the connector body 40 into engagement with the ferrule lip88, whereupon the gland 54 is moved up against the cam surface 89defined by the lip and nut 48 is threaded onto body end portion 44.Threading of the nut 48 onto the connector body end portion 44 draws thecam surface 100 of the nut 48 against the peripheral surface 100 of thegland, which surface 110 if not already in contact with the cam surface89, is now moved into engagement with the surface 89 of the ferrule lip.The camming action of the surfaces 100 and 89 on gland surface 110contracts the gland 54 to draw its end portions 106 and 108 intosubstantial juxtaposition or engagement with each other whereby thegland is somewhat pressed into and tightly engages the surface 56 of theconduit sheathing 32 in a sealtight manner.

It is to be noted that while the sheathing surface 56 will be indenteddue to'the contraction of the gland 54 that is involved, it will not besevered or penetrated in any manner, and the resilient nature of thesheathing 32 in reacting to the compression action generated on it bythe gland insures an effective sealing relation longitudinally of theconduit at the gland edge portions 114 and 116.

It will also be noted that the ferrule lip 88 is held in firm electricalcontact relation with connector body 40, which contact thus completesthe ground between core 24 and connector body 40, with the groundingconnection to the body 40 being substantially 360 about the axisthereof.

The connector body end portion 42 then may have applied thereto theretainer disc 49 and seal 47 in that order, and this assembly is appliedto the box opening 22 and the locknut 46 turned thereon for locking theconnector body to thebox in the usual conventional manner and effectinga liquidtight seal between the body 40 and the box. Assuming box 12 isgrounded in a suitable conventional manner, the core 24 of conduit 14will now be grounded through ferrule 50, body 40 and nut 46.

Altemately, the connector body 40 can first be applied to the box byapplication of its end portion 42 to the knockout opening in the mannerindicated followed by application of the lock nut 46 thereto in thewell-known conventional manner, with the conduit 14 then being appliedto the connector body end portion 40 in the manner described immediatelyabove.

Reference numeral of FIG. 4 generally indicates an embodiment of theliquidtight connector of this invention that is adapted for applicationto a hub-type application opening 124 of box 122 for the purpose ofsecuring same to conduit 14A.

The box 122 is entirely conventional in nature, and is intended torepresent any form of box or receptacle turned with a conventionaltapered threaded opening or hub 124 for application thereto ofelectrical connectors or fittings. As is conventional, the threads 126of opening 124 are tapered. The conduiting 14A is the same as conduiting14 of FIGS. l-3 and the connector 120 generally comprises a connectorbody 40A that is the same as body 40 and defines threaded end portions42A and 44A, a seal nut 48A that is received on connector body portion44A, a ferrule 50A that is received over the eutoif end 52A of theconduit 14A and is received within the connector body 40A, and acontractable gland 54A that is applied over the conduit 14A and isclamped by the seal nut against the ferrule 50A to contract same intosealing relation with the external surface 56A of the conduit 14A. Thethreaded end portion 42A of body 40 is tapered to complement the taperof threading 126 of hub 124. The other parts of the connector 120 arethe same as connector 10, except locknut 46, seal 47 and retainer 49,which are omitted.

The connector 120 may be employed to attach the conduiting 14A to thehub-type opening 124 by applying the conduiting 14A to body 40A in themanner described in connection with body 40, and then turning theconnector body end portion 42A into tight threaded engagement with thethreaded opening 124 of hub 122. The tapered threading of hub opening124 and connector body portion 42A eliminates the need for a sealcomparable to O-ring seal 47 in connection with connector 120, theconduit core thus being grounded through ferrule 50A, body 40 and hub124.

Alternately, the connector body 40A can f'ust be applied to the hub byapplication of its end portion 42A to opening 124 in the mannerindicated with the conduit 14A then being applied to the connector bodyend portion 40 in the manner described above.

[twill therefore be seen that this invention provides a liquidtightcoupling of few and simple parts that can readily be applied towaterproofed conduiting to provide an effective and reliable liquidtightseal at the box or other structure to which the conduiting is to beconnected. The split nature of the gland and the manner of itsapplication to the conduit accommodates some variation in externaldiameter of the conduiting without materially affecting the resultingseal in an adverse manner.

The foregoing description and the drawings are given merely to explainand illustrate the invention and the invention is not to be limitedthereto, except insofar as the appended claims are so limited, sincethose skilled in the art who have the disclosure before them will beable to make modifications and variations therein without departing fromthe scope of the invention.

1 claim:

1. A liquidtight connector for application to the cutoff end ofliquidtight flexible metallic conduit of the type including a resilientsheath enclosing a flexible core defined by spirally wound metalstripping forming an internal spiralled groove,

said connector comprising:

a ferrule formed from an electrically conducting material andcomprising:

an inner sleeve portion proportioned to be closely received inside theconduit core,

said ferrule inner portion being threaded for threaded engagement withthe core groove,

said ferrule further defining an outer sleeve portion in concentricrelation about said inner portion thereof and spaced radially from saidferrule inner portion to closely receive the cutoff end of the conduittherebetween when said inner portion thereof is threaded into theconduit core,

said ferrule portions integrally merging together in a ferrule endportion,

a body member comprising a tubular element having external threading atone end thereof, with said body member one end terminating in a terminaledge portion,

said body member one end being proportioned to closely receive saidferrule outer portion and having its terminal edge portion formed todefine an internal annular bevel surface thereabout that converges inthe direction of the other end of said body member,

said ferrule outer portion projecting away from said ferrule end portionand tenninating in an outwardly flared annular lip substantiallycomplementing said body member bevel surface,

a contractable gland adapted to be received over the conduit end,

said gland comprising a ring element formed from a flexible material andhaving a convexly shaped outer surface and an internal diameterproportioned to closely receive the conduit sheath,

said ring element being split to define end portions that are spacedapart in the unstressed condition thereof, with said ring element beingproportioned radially thereof such that when said end portions thereofare in abutting relation, the internal diameter of said ring element isless than the external diameter of the conduit sheath, and

a clamp nut including a threaded portion at one end thereof adapted tobe threaded on said threading of said body member one end, and anannular shoulder adjacent the other end thereof that is formed with abevel surface facing said one end thereof and that converges in adirection away from said one end thereof,

said nut shoulder having an internal diameter to closely receive theconduit sheath when said nut is applied to the conduit,

whereby when said nut and said gland have been received over the conduitend in that order with said not bevel surface facing in the direction ofthe conduit end, and said ferrule inner sleeve portion has been threadedinto the conduit end to lodge same between said ferrule inner and outerportions, on slipping said body member one end over said ferrule outersleeve portion and threading said nut one end onto said body member oneend, said body member bevel surface is brought into abutting relationwith said ferrule lip on one side of said lip and said gland is trappedbetween said ferrule lip on the other side of same and said nut bevelsurface with said lip with said nut surface engaging said gland surface,whereby said gland may be cammed into liquidtight relation with theconduit sheath by said lip and said nut surface as said nut is furtherturned onto said body member one end with said gland surface being inliquidtight relation with said lip, and said ferrule lip will be held in360 electrical conducting relation with said body member.

2. A liquidtight connection arrangement for connecting the cutoff end ofliquidtight flexible metallic conduit to an electrical box or the like,wherein the conduit is of the type including a resilient sheathenclosinga flexible core defined by spirally wound metal stripping fonning aninternal spiralled groove,

said connector arrangement comprising:

a ferrule formed from an electrically conducting material andcomprising:

an inner sleeve portion proportioned to be closely received inside theconduit core,

said ferrule inner portion being threaded for threaded engagement withthe core groove,

said ferrule further defining an outer sleeve portion in concentricrelation about said inner portion thereof and spaced radially from saidferrule inner portion to closely receive the cutoff end of the conduittherebetween when said inner portion thereof is threaded into theconduit core,

said ferrule portions integrally merging together in a ferrule endportion, a

a body member comprising a tubular element having external threading atone end thereof, with said body member one end terminating in a terminaledge portion,

said body member one end being proportioned to closely receive saidferrule outer portion and having its terminal edge portion formed todefine an internal annular bevel surface thereabout that converges inthe direction of the other end of said body member,

said body member other end being of lesser outer diameter than said oneend thereof, and said member defining a hex-shaped shoulder thereaboutand intermediate said ends thereof,

said body member other end being received in a fitting receiving openingin the box,

means for securing said member other end to the box,

said ferrule outer portion projecting away from said ferrule end portionand terminating in an outwardly flared annular lip substantiallycomplementing said body member bevel surface,

a contractable gland adapted to be received over the conduit end,

said gland comprising a ring element formed from a flexible material andhaving a convexly shaped outer surface and an internal diameterproportioned to closely receive the conduit sheath,

said ring element being split to define end portions that are spacedapart in the unstressed condition thereof, with said ring element beingproportioned radially thereof such that when said end portions thereofare in abutting relation, the internal diameter of said ring element isless than the external diameter of the conduit sheath, and a clamp nutincluding a threaded portion at one end thereof adapted to be threadedon said threading of said body member one end, and an annular shoulderadjacent the other end thereof that is formed with a bevel surfacefacing said one end thereof and that converges in a direction away fromsaid one end thereof, said nut shoulder having an internal diameter toclosely receive the conduit sheath when said nut is applied to theconduit, and means for forming a liquidtight seal between said memberother end and the box, said nut and gland being received over theconduit end in that order with said nut bevel surface facing in thedirection of the conduit end, and said ferrule inner sleeve portionbeing threaded into the conduit end to lodge same between said ferruleinner and outer portions, said body member one end being received oversaid ferrule outer sleeve portion, said nut one end being threaded ontosaid body member one end to bring said body member bevel surface intoabutting relation with said ferrule lip on one side of said lipand trapsaid gland between said ferrule lip on the other side of same and saidnut bevel surface with said lip and said nut surface engaging said glandsurface, whereby :said gland may be cammed into liquidtight relationwith the conduit sheath by said lip and said nut surface as said nut isfurther turned onto said body member one end with said gland surfacebeing in liquidtight relation with said lip, and whereby said ferrulelip is held in 360 electrical conducting relation with said body member.3. The connector set forth in claim 2 wherein: said. seal forming meanscomprises an O-ring seal and retainer therefor interposed between saidmember shoulder and the box,

said securing means comprising a locknut received over said screwthreading, member 9 a and tumed p against the box to clamp with saidmember other end being tightly turned into said sea] In sealmgengagemeqt box opening to provide both said sealing means and said 4.The connector set forth in claim 2 wherein: Securing means 7 said sealfonning means comprises said box opening and 5 said member other endbeing formed with tapered mating

1. A liquidtight connector for application to the cutoff end of liquidtight flexible metallic conduit of the type including a resilient sheath enclosing a flexible core defined by spirally wound metal stripping forming an internal spiralled groove, said connector comprising: a ferrule formed from an electrically conducting material and comprising: an inner sleeve portion proportioned to be closely received inside the conduit core, said ferrule inner portion being threaded for threaded engagement with the core groove, said ferrule further defining an outer sleeve portion in concentric relation about said inner portion thereof and spaced radially from said ferrule inner portion to closely receive the cutoff end of the conduit therebetween when said inner portion thereof is threaded into the conduit core, said ferrule portions integrally merging together in a ferrule end portion, a body member comprising a tubular element having external threading at one end thereof, with said body member one end terminating in a terminal edge portion, said body member one end being proportioned to closely receive said ferrule outer portion and having its terminal edge portion formed to define an internal annular bevel surface thereabout that converges in the direction of the other end of said body member, said ferrule outer portion projecting away from said ferrule end portion and terminating in an outwardly flared annular lip substantially complementing said body member bevel surface, a contractable gland adapted to be received over the conduit end, said gland comprising a ring element formed from a flexible material and having a convexly shaped outer surface and an internal diameter proportioned to closely receive the conduit sheath, said ring element being split to define end portions that are spaced apart in the unstressed condition thereof, with said ring element being proportioned radially thereof such that when said end portions thereof are in abutting relation, the internal diameter of said ring element is less than the external diameter of the conduit sheath, and a clamp nut including a threaded portion at one end thereof adapted to be threaded on said threading of said body member one end, and an annular shoulder adjacent the other end thereof that is formed witH a bevel surface facing said one end thereof and that converges in a direction away from said one end thereof, said nut shoulder having an internal diameter to closely receive the conduit sheath when said nut is applied to the conduit, whereby when said nut and said gland have been received over the conduit end in that order with said nut bevel surface facing in the direction of the conduit end, and said ferrule inner sleeve portion has been threaded into the conduit end to lodge same between said ferrule inner and outer portions, on slipping said body member one end over said ferrule outer sleeve portion and threading said nut one end onto said body member one end, said body member bevel surface is brought into abutting relation with said ferrule lip on one side of said lip and said gland is trapped between said ferrule lip on the other side of same and said nut bevel surface with said lip with said nut surface engaging said gland surface, whereby said gland may be cammed into liquidtight relation with the conduit sheath by said lip and said nut surface as said nut is further turned onto said body member one end with said gland surface being in liquidtight relation with said lip, and said ferrule lip will be held in 360* electrical conducting relation with said body member.
 2. A liquidtight connection arrangement for connecting the cutoff end of liquidtight flexible metallic conduit to an electrical box or the like, wherein the conduit is of the type including a resilient sheath enclosing a flexible core defined by spirally wound metal stripping forming an internal spiralled groove, said connector arrangement comprising: a ferrule formed from an electrically conducting material and comprising: an inner sleeve portion proportioned to be closely received inside the conduit core, said ferrule inner portion being threaded for threaded engagement with the core groove, said ferrule further defining an outer sleeve portion in concentric relation about said inner portion thereof and spaced radially from said ferrule inner portion to closely receive the cutoff end of the conduit therebetween when said inner portion thereof is threaded into the conduit core, said ferrule portions integrally merging together in a ferrule end portion, a body member comprising a tubular element having external threading at one end thereof, with said body member one end terminating in a terminal edge portion, said body member one end being proportioned to closely receive said ferrule outer portion and having its terminal edge portion formed to define an internal annular bevel surface thereabout that converges in the direction of the other end of said body member, said body member other end being of lesser outer diameter than said one end thereof, and said member defining a hex-shaped shoulder thereabout and intermediate said ends thereof, said body member other end being received in a fitting receiving opening in the box, means for securing said member other end to the box, said ferrule outer portion projecting away from said ferrule end portion and terminating in an outwardly flared annular lip substantially complementing said body member bevel surface, a contractable gland adapted to be received over the conduit end, said gland comprising a ring element formed from a flexible material and having a convexly shaped outer surface and an internal diameter proportioned to closely receive the conduit sheath, said ring element being split to define end portions that are spaced apart in the unstressed condition thereof, with said ring element being proportioned radially thereof such that when said end portions thereof are in abutting relation, the internal diameter of said ring element is less than the external diameter of the conduit sheath, and a clamp nut including a threaded portion at one end thereof adapted to be threaded on said threading of said body member one end, and an annular shoulder adjacent the other end thereof that is formed with a bevel surface facing said one end thereof and that converges in a direction away from said one end thereof, said nut shoulder having an internal diameter to closely receive the conduit sheath when said nut is applied to the conduit, and means for forming a liquidtight seal between said member other end and the box, said nut and gland being received over the conduit end in that order with said nut bevel surface facing in the direction of the conduit end, and said ferrule inner sleeve portion being threaded into the conduit end to lodge same between said ferrule inner and outer portions, said body member one end being received over said ferrule outer sleeve portion, said nut one end being threaded onto said body member one end to bring said body member bevel surface into abutting relation with said ferrule lip on one side of said lip and trap said gland between said ferrule lip on the other side of same and said nut bevel surface with said lip and said nut surface engaging said gland surface, whereby said gland may be cammed into liquidtight relation with the conduit sheath by said lip and said nut surface as said nut is further turned onto said body member one end with said gland surface being in liquidtight relation with said lip, and whereby said ferrule lip is held in 360* electrical conducting relation with said body member.
 3. The connector set forth in claim 2 wherein: said seal forming means comprises an O-ring seal and retainer therefor interposed between said member shoulder and the box, said securing means comprising a locknut received over said member other end and turned up against the box to clamp said seal in sealing engagement therewith.
 4. The connector set forth in claim 2 wherein: said seal forming means comprises said box opening and said member other end being formed with tapered mating screw threading, with said member other end being tightly turned into said box opening to provide both said sealing means and said securing means. 